Radio telegraph and telephone system.



I F. e. SIMPSON. RADIOTELEGRAPH AND TELEPHONE SYSTEM.

APPLICATION FILED MAY 25,1916- latented Feb. 27, 1917.

p more particularly to the transmitting ap-- UNITED STATES PATENT OFFICE.

FEEDER 10K o; snmrson, orsna'r'rm, WASHINGTON.

RADIO TELEGRAPH AND TELEPHONE SYSTEM.

To all whvmit may concern: v

Be it known that l, Flu-ammo]; G. SIMP- SON, citizen oi the United States, residing at Seattle, in .the county of Kingand State of Washington, have invented acertain new a and usefulImprovement in Radio Telegraph and-Telephone Systems, of which the following is a specification.

f My invention relates to improvements in radio telegraph and telephone "systems,;but

Y paratus thereof, and the object of-my invenranged in accordance withlany one of the -,severa'l plans that are diagrammatically illustionisto provide a novel combination of well known elements to form a transmitting system which shall include as principal parts thereof, the elevated conductors'of an antenna, acondenser and a spark-gap, for radio transmission of energy in; the form of electromagnetic waves whereby, in the operation of such'system the, spark discharge. across,

said s ark-gap, due toa chargelof electricity in di erent parts'of said transmitting sys tern, but principally iii said condenser, will be instantly quenched upon, the first discharge, oi'said condenser, such discharge consisting of a unidirectional impulse of electric current, following which no spark would occur in said spark-gap in response to resultant oscillations of the same charge in the a$ociatedantenna circuit.

I accomplishithis ob'ect by circuits and well-known forms of instrumentswhen artrated in Figures 1, 2 and respectively, .ofthe accompanying drawings, each of which plans embodies my'invention, but in ,eachiof said Figs. 1, 2 and 3 my said invention is shown" inn slightly different form.

Referring to the-drawings. in each of theFi-gs. '1, 2 and :3 the numeral 5 designates theeleyated conductors of'an antenna of a radiojtelegraphor telephone system with which'isassoci'ated .an, inductance coil, as], inductance coils 11 'or 19, an adjustable con I denser 6,'a11 earth connection 7, an adjustable sparlegap 8 and-.terniin'als 9 and 10, of a i key-controlled charging circuit.-

' Referring particularly to Fig. 1,the eleatedjconductors 5 of the antenna are connected to'-one terminal of the condenser 6 .tl1rough the inductance coil 11,, the other terminal of'said condenser 6 being-connected,

byconductor 12 to the earth7.

At a, point between the inductance coil 11 and the adjacent terminal of the condenser duct ance coil 11 and where the Specification of Letters Patent. Patented Feb, 2'1, 191'1 Application filed Kay 25, 1916. Serial lie. 98,914. i i

spark-gap 8 is connected to one endof a conductor 14 whose other end is connected to .the inductance coil '11, said other end ofsaid conductor 1-1 beingadapted in a well known manner to be adjustable to connectit to said inductance coil 11 at any one of different points thereon as may be required under different conditions of operation. j In said Fig. 1, contemplating the eleizllifill conductors 5 of the antenna, the inductance" coil 11, the condenser 6, theeonductor 12 and the, earth 7' as constitutingan oscillator energized by a charging circuit connected with.terminals 9 and 10; then the potential distribution and the wave len ths of oseilla ti'onsJ-ih such oscillator wil be governed largely by therel'ative capacities of the elevated c0nductors 5 of the antenna with re- 's'pect to theearth 7 and the eonden'serfijand the amount of inductance produced by the coil. 11; and hence the wave lengths of oscil-v lations in said oscillator and the position therein of-the nodes of potential during such oscillations. will also be governed thereby.

Now, ifit be assumed that the curved broken lines 15 in said Fig. 1 represents. the potential distribution in said oscillator and the nodes ofpotenti'al' as fixed therein at points-where one'of said broken lines 15 intersects the inbroken'lines touches the earth 7 then, since thejerzninals ofthe spark ga'p 8 are con- {at said'pomts to said oscillator by wires 14 and 13 respecti ely,-it is obvious thata when the condenser 6 is charged to a degree to cause a spark discharge across the spark-gap 8 (thus to discharge said con denserfi), then such spark will be instantly quenched upon the termination of said dis charge in spite'of resultant oscillations'in said oscillator, since there .can be no difference in potential between the terminals of saidspark-gap 8 by reason of it'being' connected to'said oscillator at nodal points of potential. r

Mai 'estly, the capacity of the condenser 6 and the point of connection between the conductor 1i and the inductance coil 11 may be changed to suit antennae of different capacities and the spark-gap 8 may be adjusted to suit different conditions of operation.

The arrangement of parts of my invention as shown in Fig.2 is like their arrangement shown in Fig. 1' in mode'of o'peration and in all particulars except that m the planof Fig. 2 I have provided an inductance coil 16 connected to extend between thef-ground 7 and the point Where the terminal 10 connects with one terminal of condenser 6.

lhe arrangement of parts of my invention as shown in Fig. 3 is like their arrangement shown in Fig, .1 in mode of operation and. in all particulars except that in place of the conductors 5 of the antennawith'respect tothe earth 7, and changingthe position of the point of contact between the conductor 20 and the inductive resistance 19. I

Manifestly, under some conditions of operation an adjustable condenser 6 may be replaced by a condenser of a fixed capacity,

in'which case,'changes in the position of thenodesof potential in the oscillator would' he effected by making changes in the amount of inductance contained therem; and also a non-adjustable spark-gap might be substi-' tuted for the spark-gap-S, in which case suitable changes might be made in the energy supplied by the, charging circuit and in the capacity of the condenser-I5 Itis'plain that many changes may be made in the arrangement ofa circuit or associated circuits, includingan antenna, to form a transmitting system. of energy in the form of electromagnetic Waves; to which trans mitting system, energy, in the form of an. electric i;:urrent, 1s con'imumcated fgom lts. smirceand' 1s accumulated therein in static;

or potentialform. That inall such arrange} mama oii'i-thecircuit, or circuits, ,of "such. transnilttlng system there may be included 'a 1 spark-f'gap, the terminals: of which are con-- nected to points-in said transmitting systo compensate for lack of adjustment of such substituted tom which will permit the static or potential energy res dent therein 'to discharge across said spark-gap in the form ofa uni-dircc ducing an oscillating circuit within said transmitting system and that said-points of connection of the terminals of said sparkgap shall be at nodes of potential; within said transmitting s stem so that no potential difference shall exist between the electrodes of said spark-gap during the existence of such oscillatin current.

I do not limit myself to any particular cirs cuit or arrangement of circults, nor do I limit myself .to anexact adjustment of the terminals of the spark-gap with respect to the-exact nodes of potential Within a radio' transmittin system.

It issu cient for all practical purposes that the terminals of the spark-gap shall be tional electric current impul'se thereby procrmnectedxto points in-said, transmitting system which are substantially' nodal points of an oscillating electric current therein It is necessary, however 'that the point of connectionof the terminals of the spa rk-- gap to the oscillating circuit, or circuits, of such transmitting system shall be sufliciently near to nodal points of potential distribution as will limit the difference of electric potential between the electrodes of said spm'k g-ap to down of the resistance of said sparloga'p'. which breaking down of resistance would. permitoscillating current to pass through such spark-gapQ a lVhat I claim is: I

Iii'transmitting ap I cal system of radio communication, the combination with an oscillating circuit which tern'iinal's are connected with said oscillating nodal points of potential therein.

2. A radio system of communication havan' amount insuflicient to cause a breaking aratus of an 'electriing electric circuits which include an*oscil--- lating-circuit and a spark-gap whosetermi-.

nals are connectedwith-said oscillating cir- 'cuit at points near the nodal points of poten- -tia.l"therein, whereby oscillating'currents in said oscillating circuit shall have little tendency tojump across said spark-gap.-

In witness whereof, I hereunto 4 my name this12th day of May A; 1)., 1916.

- FREDERICK Witnssespf Frisian Wamu n-x 0-. JonNsoN.

subscribesnursou.

includes an earth connection,,an antenna, an

inductance and a..-condenser; of a charging a. 

